Improvement in oil and other presses



A. SHEDLCK.

Oil and other Presses.

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ALFRED SHEDLOGK, OF NEW YORK, N. Y.

IMPRCJVEMEFQTv IN Oll. AND OTHER PRESSES.

Specification forming part of Letters Patent No. lig, dated April 20, 1875; application filed March 26, 1875.

To all whom it may concern Be it known that I, ALFRED SHEDLooK, of the city of New York, county and State of New York, have invented certain Improvements in Presses, of which the following is a specification This invention has for its object 4the assuring the perfect working of the iniddlejoints of the toggle-levers in a toggle-lever pressthat is, causing the joints to travel toward the center of the follower at anequ-.il rate of speed, whether they are drawn together by a screw or by other means; and it consists in pivoting a link to each pair of toggle-levers, and connecting` the other ends of the links together at the center ofthe follower, said central connection fitting into grooves made in the inside of the two followers. As the ends of the toggle-levers, which work in the headblock, and followers, are some distance from the center line of the followers, it follows that the links are never in line with the togglelevers; so they perfectly control the action of the toggles in whatever position the joints may be in, for if one ot' the pairs of togglejoints tends to travel toward the center line of the pressl at a less rate of speed than the other pair-caused by an unequal pressure under the platenit would prevent the central connection of the links from traveling down as fast as they otherwise would, and, consequently, would retard the motion ot' the other pair of toggle-joints toward the center of the press. p

'lhe device is shown in the accompanying drawings asapplied to a press in which the follower is not permanently fastened to the toggle-joints, but is provided with notches in which the lower ends of the toggles work.

Figure l is a front elevation with the front follower cut away to more clearly show the controlling-links. Fig. 2 is a sectional plan view cut through the line x x in Fig. l.

a represents the head-block b b, the tension and supporting rods secured to the headblock a and foot-block or base c. The togglelevers d d are suspended in the head-block a, and to their middle joints is pivoted one end of each of the links e e. The other ends of the links are connected together at e', and fit into the groovesf f formed in the insides of the followers f1 f1, said followers being secured to the platen g, and passing up through the head-block a. The lower ends of the togglelevers work in notches f2 f2 formed in the sides of the followers, and they are held together by the spring g. When the togglelevers have been drawn together so that their joints are in a straight line, by turning the crank-wheel h on the end of the screw i the pinj` is passed through one of the holesf3 in the followers, just under the head-block, and retains the pressure While the screw is being reversed to take another gripe on the followers with the toggle-levers. To raise the platen and followers a pin is passed through one of the holes l)t'3,just abovel the central connection of the links c c, so that as the links are raised by moving out the toggle levers the platen is raised with it, and a pin is passed through the holeff,just above the head-block, so as to hold up the followers and platen, if it is required to raise them higher than can be done by one outward motion of the toggle-levers. To keep the lower ends of the toggle levers clear ot' the notches in the followers when the followers are being raised, a bar, 7c, is pivoted to one ofthe lower' ends of the toggles d, andl a notch, lo', ts over a pin standing out from the other toggle. A projection,f4, on the followers or platen, raises the bar lc, and allows the springg to draw the toggles into the lowest notch in the followers when the platen is raised to its highest point. The links e e would control the working of the toggleievers d d it' they were pivoted to the levers themselves instead of being pivoted to the middle joint.

What I claim, and desire to secure by Letters Patent, is

In a toggle-lever press, the links e e, controlled by the standards or followers, in combination with the toggle-levers d d, substantially as and for the purposes hereinbefore set forth.

ALFRED sHEDLooK.

Witnesses WILLIAM SHEDLooK, WILLIAM H. HALLOWELL. 

